Home / 13,123.16-18,108.60-7,816.94

Finding the Fourth Proportional to 13,123.16, 18,108.60 and 7,816.94

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Solution

The fourth proportional to 13,123.16, 18,108.60 and 7,816.94 is: 10,786.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.16 : 18,108.60 = 7,816.94 : x
  2. Step 2: Convert to fraction form
    13,123.16/18,108.60 = 7,816.94/x
  3. Step 3: Cross multiply
    13,123.16x = 18,108.60 × 7,816.94
  4. Step 4: Simplify right side
    13,123.16x = 141,553,839.68
  5. Step 5: Solve for x
    x = 141,553,839.68/13,123.16
  6. Step 6: Final answer
    x = 10,786.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.